“This review is based on matching the Mini X with Hifiman He-500 Headphones.
You may be reading this review, unsure what to make of this Amp, asking how can a cheap sub $200 amp offer the power needed for an expensive Headphone such as the Hifiman He-500? If you have done your homework you will find this is the stereo amp everybody is...” --fluidz

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Originaly built three years ago for my new RE0s to get rid of hiss and get some more bass from FUZE2 and I've hit the target accurately. Anyway, after some amount of time, I found it to be easier and more reasonable to just simply set up the EQ in Rockbox. Now using Comply T-400 it's quite enough.
By now using in combo with uDAC2 and ATH-M50S when playing music from foobar...” --El Pino

UPA-200 represents a true breakthrough in audiophile-quality amplification. At last, a truly affordable stereo power amplifier that can satisfy the most discerning aficionado, and at the same, is affordable to anyone with a desire for real quality. Our advanced engineering and design techniques have resulted in an amazing new amplifier. Its rock solid performance and affordable price point...

M³ is a high-end DIY stereo amplifier for dynamic headphones. It includes a number of distinctive features, carefully considered to maximize performance while keeping the cost modest. M³ is also usable as an excellent pre-amplifier line stage or low-power speaker amplifier. See the other options section for details.
Pronounced "M cubed", the name reflects the three MOSFET...